Procedure to get Authorization for own kafeel's car going to bahrain

Dear all,
I want to go to Bahrain on EID vacations by road driving my own kafeel's Car. I need information about Procedure to get Authorization for kafeel's car going to bahrain on entry to Bahrain Border. Is it permissible to carry it and if yes then What documents required from kafeel if any OR from any other departments.

Thanking you in anticipation.

Just ask your Kafeel ( Sponsor) to apply for a "Authorization Letter" from the Traffic Police in Saudi Arabia !
Costs around 100-200 SR !

That's the only thing needed !